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  1. /* cairo - a vector graphics library with display and print output
  2.  *
  3.  * Copyright © 2011 Intel Corporation
  4.  *
  5.  * This library is free software; you can redistribute it and/or
  6.  * modify it either under the terms of the GNU Lesser General Public
  7.  * License version 2.1 as published by the Free Software Foundation
  8.  * (the "LGPL") or, at your option, under the terms of the Mozilla
  9.  * Public License Version 1.1 (the "MPL"). If you do not alter this
  10.  * notice, a recipient may use your version of this file under either
  11.  * the MPL or the LGPL.
  12.  *
  13.  * You should have received a copy of the LGPL along with this library
  14.  * in the file COPYING-LGPL-2.1; if not, write to the Free Software
  15.  * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
  16.  * You should have received a copy of the MPL along with this library
  17.  * in the file COPYING-MPL-1.1
  18.  *
  19.  * The contents of this file are subject to the Mozilla Public License
  20.  * Version 1.1 (the "License"); you may not use this file except in
  21.  * compliance with the License. You may obtain a copy of the License at
  22.  * http://www.mozilla.org/MPL/
  23.  *
  24.  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
  25.  * OF ANY KIND, either express or implied. See the LGPL or the MPL for
  26.  * the specific language governing rights and limitations.
  27.  *
  28.  * The Original Code is the cairo graphics library.
  29.  *
  30.  * The Initial Developer of the Original Code is Red Hat, Inc.
  31.  *
  32.  * Contributor(s):
  33.  *      Chris Wilson <chris@chris-wilson.co.uk>
  34.  */
  35.  
  36. #include "cairoint.h"
  37.  
  38. #include "cairo-gl-private.h"
  39.  
  40. #include "cairo-surface-backend-private.h"
  41.  
  42. static cairo_status_t
  43. _cairo_gl_source_finish (void *abstract_surface)
  44. {
  45.     cairo_gl_source_t *source = abstract_surface;
  46.  
  47.     _cairo_gl_operand_destroy (&source->operand);
  48.     return CAIRO_STATUS_SUCCESS;
  49. }
  50.  
  51. static const cairo_surface_backend_t cairo_gl_source_backend = {
  52.     CAIRO_SURFACE_TYPE_GL,
  53.     _cairo_gl_source_finish,
  54.     NULL, /* read-only wrapper */
  55. };
  56.  
  57. cairo_surface_t *
  58. _cairo_gl_pattern_to_source (cairo_surface_t *dst,
  59.                              const cairo_pattern_t *pattern,
  60.                              cairo_bool_t is_mask,
  61.                              const cairo_rectangle_int_t *extents,
  62.                              const cairo_rectangle_int_t *sample,
  63.                              int *src_x, int *src_y)
  64. {
  65.     cairo_gl_source_t *source;
  66.     cairo_int_status_t status;
  67.  
  68.     TRACE ((stderr, "%s\n", __FUNCTION__));
  69.     if (pattern == NULL)
  70.         return _cairo_gl_white_source ();
  71.  
  72.     source = malloc (sizeof (*source));
  73.     if (unlikely (source == NULL))
  74.         return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
  75.  
  76.     _cairo_surface_init (&source->base,
  77.                          &cairo_gl_source_backend,
  78.                          NULL, /* device */
  79.                          CAIRO_CONTENT_COLOR_ALPHA);
  80.  
  81.     *src_x = *src_y = 0;
  82.     status = _cairo_gl_operand_init (&source->operand, pattern,
  83.                                      (cairo_gl_surface_t *)dst,
  84.                                      sample, extents,
  85.                                      FALSE);
  86.     if (unlikely (status)) {
  87.         cairo_surface_destroy (&source->base);
  88.         return _cairo_surface_create_in_error (status);
  89.     }
  90.  
  91.     return &source->base;
  92. }
  93.  
  94. cairo_surface_t *
  95. _cairo_gl_white_source (void)
  96. {
  97.     cairo_gl_source_t *source;
  98.  
  99.     source = malloc (sizeof (*source));
  100.     if (unlikely (source == NULL))
  101.         return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
  102.  
  103.     _cairo_surface_init (&source->base,
  104.                          &cairo_gl_source_backend,
  105.                          NULL, /* device */
  106.                          CAIRO_CONTENT_COLOR_ALPHA);
  107.  
  108.     _cairo_gl_solid_operand_init (&source->operand, CAIRO_COLOR_WHITE);
  109.  
  110.     return &source->base;
  111. }
  112.